From d06ca5e7a3cf726f5be5ffd96e93ccd798b8c09a Mon Sep 17 00:00:00 2001
From: Georgi Djakov <georgi.djakov@linaro.org>
Date: Thu, 12 May 2016 14:41:33 +0300
Subject: [PATCH 51/69] PM / OPP: Add a helper to get an opp regulator for
 device

Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
---
 drivers/base/power/opp/core.c | 21 +++++++++++++++++++++
 include/linux/pm_opp.h        |  1 +
 2 files changed, 22 insertions(+)

--- a/drivers/base/power/opp/core.c
+++ b/drivers/base/power/opp/core.c
@@ -126,6 +126,27 @@ unsigned long dev_pm_opp_get_freq(struct
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
 
+struct regulator *dev_pm_opp_get_regulator(struct device *dev)
+{
+	struct opp_table *opp_table;
+	struct regulator *reg;
+
+	rcu_read_lock();
+
+	opp_table = _find_opp_table(dev);
+	if (IS_ERR(opp_table)) {
+		rcu_read_unlock();
+		return ERR_CAST(opp_table);
+	}
+
+	reg = opp_table->regulators[0];
+
+	rcu_read_unlock();
+
+	return reg;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_regulator);
+
 /**
  * dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not
  * @opp: opp for which turbo mode is being verified
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -85,6 +85,7 @@ void dev_pm_opp_put_opp_table(struct opp
 unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
 
 unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
+struct regulator *dev_pm_opp_get_regulator(struct device *dev);
 
 bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);
 
